Intravascular Blood Pump Cassette for Precise Fluid Flow Control
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Solution Overview
Problem
Existing ventricular support devices and blood pumps face challenges in providing effective cardiac outflow support, especially during corrective procedures, with a need for improved stability and volume of blood flow, and there is a requirement for minimally-invasive solutions that reduce the workload on the heart muscle.
Innovation Solution
A removable cassette for an intravascular blood pump system, comprising a cassette housing with multiple fluid pathways and flow control openings, and an external console with independently controllable actuators, allowing precise management of fluid flow through the pump.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a percutaneous blood pump is inserted through an access sheath to provide minimally-invasive cardiac support, then the invasiveness of the procedure is reduced, but the control precision and fluid management capability are limited
Solution Approach 1:
The system is divided into separate functional modules: a percutaneous pump device for minimally-invasive insertion and an external console for comprehensive fluid management. The access sheath, pump, and control mechanisms are segmented into distinct components that can be independently optimized, allowing the pump to remain small and minimally-invasive while the external console provides advanced fluid management capabilities.
Solution Approach 2:
An external console acts as an intermediary between the operator and the percutaneous pump, providing sophisticated fluid management capabilities without requiring complex mechanisms within the pump itself. The console communicates with and controls the pump through standardized interfaces, enabling precise fluid management while keeping the implanted device simple and minimally-invasive.
2Volume of moving object
If the blood pump is made compact for percutaneous insertion, then the procedural invasiveness is reduced, but the flow control precision and stability are compromised
Solution Approach 1:
Complex control mechanisms, including flow sensors, pressure sensors, and control electronics, are extracted from the pump body and placed in an external console. This allows the pump itself to remain compact for percutaneous insertion while the external console provides precise flow control measurements and adjustments through dedicated sensing and control systems.
Solution Approach 2:
The system employs dynamic control through the external console, which can adjust pump parameters in real-time based on feedback from sensors. This dynamic adjustment capability compensates for the reduced size of the pump, maintaining flow control precision through active management rather than relying solely on the physical dimensions of the pump components.
3Adaptability or versatility
If multiple fluid pathways are integrated into the pump system for comprehensive fluid management, then the fluid control capability is improved, but the device complexity increases
Solution Approach 1:
The external console is designed as a universal control platform that manages multiple fluid pathways (blood flow, flushing fluid, lubricating fluid) through a single integrated interface. This multi-functional console reduces the need for separate control systems for each fluid pathway, thereby managing complexity while maintaining comprehensive fluid control capability across all pathways.
Solution Approach 2:
The external console serves as an intermediary that coordinates control across multiple fluid pathways without requiring complex integration within the pump itself. Each pathway can be managed independently through the console, allowing comprehensive fluid control while keeping the pump device relatively simple and the complexity distributed across the external control system.
Data Source
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Figure 3A~3B
Figure 3C~3D
AI summary
Intravascular blood pumps and methods of use. The blood pump include a pump portion that includes a collapsible blood conduit defining a blood flow lumen between an inflow and an outflow. The pump portion includes a distal collapsible impeller axially spaced from a proximal collapsible impeller, at least a portion of each of the distal and proximal collapsible impellers disposed between the inflow and the outflow.